1# Copyright (c) 2013 Advanced Micro Devices, Inc.
2# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
3# Copyright (c) 2009 The Hewlett-Packard Development Company
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions are
8# met: redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer;
10# redistributions in binary form must reproduce the above copyright
11# notice, this list of conditions and the following disclaimer in the
12# documentation and/or other materials provided with the distribution;
13# neither the name of the copyright holders nor the names of its
14# contributors may be used to endorse or promote products derived from
15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29from slicc.ast.StatementAST import StatementAST
30from slicc.symbols import Var
31
32class EnqueueStatementAST(StatementAST):
33    def __init__(self, slicc, queue_name, type_ast, lexpr, statements):
34        super(EnqueueStatementAST, self).__init__(slicc)
35
36        self.queue_name = queue_name
37        self.type_ast = type_ast
38        self.latexpr = lexpr
39        self.statements = statements
40
41    def __repr__(self):
42        return "[EnqueueStatementAst: %s %s %s]" % \
43               (self.queue_name, self.type_ast.ident, self.statements)
44
45    def generate(self, code, return_type):
46        code("{")
47        code.indent()
48        self.symtab.pushFrame()
49
50        msg_type = self.type_ast.type
51
52        # Add new local var to symbol table
53        v = Var(self.symtab, "out_msg", self.location, msg_type, "*out_msg",
54                self.pairs)
55        self.symtab.newSymbol(v)
56
57        # Declare message
58        code("std::shared_ptr<${{msg_type.c_ident}}> out_msg = "\
59             "std::make_shared<${{msg_type.c_ident}}>(clockEdge());")
60
61        # The other statements
62        t = self.statements.generate(code, None)
63        self.queue_name.assertType("OutPort")
64
65        if self.latexpr != None:
66            ret_type, rcode = self.latexpr.inline(True)
67            code("(${{self.queue_name.var.code}}).enqueue(" \
68                 "out_msg, clockEdge(), cyclesToTicks(Cycles($rcode)));")
69        else:
70            code("(${{self.queue_name.var.code}}).enqueue(out_msg, "\
71                 "clockEdge(), cyclesToTicks(Cycles(1)));")
72
73        # End scope
74        self.symtab.popFrame()
75        code.dedent()
76        code("}")
77
78    def findResources(self, resources):
79        var = self.queue_name.var
80        res_count = int(resources.get(var, 0))
81        resources[var] = str(res_count + 1)
82